CN103047464B - Locator - Google Patents
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- CN103047464B CN103047464B CN201210384598.XA CN201210384598A CN103047464B CN 103047464 B CN103047464 B CN 103047464B CN 201210384598 A CN201210384598 A CN 201210384598A CN 103047464 B CN103047464 B CN 103047464B
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- Prior art keywords
- signal
- control unit
- value
- control signal
- current
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B5/00—Transducers converting variations of physical quantities, e.g. expressed by variations in positions of members, into fluid-pressure variations or vice versa; Varying fluid pressure as a function of variations of a plurality of fluid pressures or variations of other quantities
- F15B5/006—Transducers converting variations of physical quantities, e.g. expressed by variations in positions of members, into fluid-pressure variations or vice versa; Varying fluid pressure as a function of variations of a plurality of fluid pressures or variations of other quantities with electrical means, e.g. electropneumatic transducer
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
- F16K37/0083—For recording or indicating the functioning of a valve in combination with test equipment by measuring valve parameters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/875—Control measures for coping with failures
- F15B2211/8755—Emergency shut-down
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/2278—Pressure modulating relays or followers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7758—Pilot or servo controlled
- Y10T137/7761—Electrically actuated valve
Abstract
The invention provides a locator which needs no configuration of an electronic switch in an adjusting loop, depends on no software and can obtain an urgent switch off function. In a comparison circuit (6), a value of a control signal from an upper device (100) and a normal scope specified for the value is compared and comparison results can be transmitted to a control unit (1). If the comparison results show that the value of a control signal transmitted by the comparison circuit (6) is above the normal scope, no matter how the difference between a control signal indicating value (a set opening theta sp) and a valve opening signal indicating value (an actual opening theta pv) is, the control unit (1) adjusts a current signal sent to an electro-pneumatic converter into zero by force. Current adjustment of the control unit (1) can be performed by utilizing a normal function possessed by the control unit (1),i.e., a function of continuously changing values of a current signal (adjusting current) Io by utilizing the difference between the theta sp and theta pv.
Description
Technical field
The positioning work piece that the aperture of value to modulating valve that the present invention relates to the control signal that a kind of basis transports from epigyny device controls.
Background technique
In the past, this positioner designs became the DC current signal (control signal) of the 4 ~ 20mA transported from epigyny device by a pair electric wire to carry out action.Such as, when transporting the electric current of 4mA from upper side system, control valve opening is 0%, and when transporting the electric current of 20mA, control valve opening is 100%.
For some the industrial process control system being provided with such modulating valve, such as, in the processing system of oil, gas etc., correspondence time urgent is outbalance.That is, not revealing for potential toxicity or flammable chemical substance, gas etc., or the situation do not carried out controlling and be discharged is not important.
Therefore, modulating valve is required to the function of emergency cut-off (shutoff) valve when urgent, be therefore designed in the positioning work piece of regulating and controlling valve opening, there is this emergency cut-off function.
In recent years, the intelligent positioning work piece in positioning work piece with microprocessor is widely spread.Adopt so intelligent positioning work piece, except the software of valve opening control is installed, is also mounted with the software of emergency cut-off function, when urgent, valve can cuts out completely.
Such as, according to the software that valve opening controls, by the process action of microprocessor, check the value of the control signal transported from epigyny device, below the setting value that the value confirming this control signal is regulation, forcibly valve cuts out completely.
But function when obtaining emergency cut-off by such software is not too satisfactory.This is because in order to prove to for such software and the reliability making digital circuit that the microprocessor of this running software is relevant etc., cost cost, also spended time.Further, because natively comparatively complicated according to the process action of software, so also worry that the mortality of the emergency cut-off realized by such process action is high to not allowing such degree.
Therefore, such as, disclose in patent documentation 1 and have and do not depend on software, and the such example of the circuit of emergency cut-off is set at positioning work piece self.In the empty controller (positioning work piece) of the electricity shown in this patent documentation 1, arrange between the control unit formed using macrogenerator, digital circuit and electro-pneumatic converter and turn off the circuit of unit as emergency cut-off.
The major component that the positioning work piece turning off unit is set between control unit and electro-pneumatic converter shown in Figure 5.In Figure 5,100 is epigyny devices, and 200 is positioning work pieces, and 300 is modulating valve.Positioning work piece 200 has: control unit 1, electro-pneumatic converter 2, control relay 3 and jaw opening sensor 4, is provided with and turns off unit 5 between control unit 1 and electro-pneumatic converter 2.
In this positioning work piece 200, control unit 1 is fed next valve opening signal as input using the control signal (DC current signal) of the 4 ~ 20mA transported from epigyny device 100 with from modulating valve 300 by jaw opening sensor 4, obtain the deviation of control signal indicating value (setting aperture θ sp) and valve opening signal indicating value (actual aperture θ pv), according to this deviation, the value of current signal Io is changed continuously and the current signal Io that have adjusted is exported as adjustment electric current.Adjustment for the electric current in this control unit 1 adopts control transistor Q1.
Electro-pneumatic converter 2 using from control unit 1, by turning off current signal (adjustment electric current) Io of unit 5 as input, and current signal (adjustment electric current) Io of this input is converted to air pressure signal Pn.Again, electro-pneumatic converter 2 is by being supplied to field coil by current signal (adjustment electric current) Io from control unit 1, and the span of the adjustment air fed nozzle of ejection and baffle plate, exports the nozzle back pressure obtained as air pressure signal Pn thus.Air pressure signal Pn from electro-pneumatic converter 2 amplifies by control relay 3, is supplied to the operator 7 of modulating valve 300 as output pressure Pout.
Turn off the electronic switch 52 that unit 5 has comparison circuit 51 and utilizes the electronic equipments such as FET, electronic switch 52 is arranged on from control unit 1 on the supply passage of current signal (adjustment electric current) Io of electro-pneumatic converter 2.In shutoff unit 5, comparison circuit 51, input to the control signal of control unit 1 as branch using from epigyny device 100, when the value of the control signal inputted by this branch is less than the threshold value of regulation, electronic switch 52 is set to cut out, cuts off from control unit 1 to the supply of current signal (adjustment electric current) Io of electro-pneumatic converter 2.Thus, be lowered in fact close to zero from the output pressure Pout of positioning work piece 200, being forced property of modulating valve 300 ground full cut-off.
Prior art document
Patent documentation
Patent documentation 1 Japanese Unexamined Patent Application Publication 2007-512622 publication
Summary of the invention
The problem that invention will solve
In positioning work piece, the adjustment electric current being supplied to electro-pneumatic converter controls the aperture of modulating valve, is very important.About the situation should not carrying out turning off, exist just in case cut-off to the supply of the adjustment electric current of electro-pneumatic converter when, the worry of complete sets of equipment grade out of service.Such as, the loop being supplied to the adjustment electric current of electro-pneumatic converter, when midway open circuit, will be absorbed in the state that supply stops.
But, in the positioning work piece 200 shown in Fig. 5, electronic switch 52 being configured on the loop of this important adjustment electric current, realizing turning off by closing this electronic switch 52.In such a configuration, exist such as due to the impact of noise etc. or produce damaged worry at electronic switch 52, even if the existence of this electronic switch 52 becomes the reason also causing unnecessary shutoff when normal due to bad, the deterioration of self.Again, must add electronic switch 52 between control unit 1 and electro-pneumatic converter 2, cost will rise.
The present invention makes to solve such problem, without the need to configuring electronic switch on the loop that its object is to be provided in adjustment electric current, and does not depend on software and can obtain the positioning work piece of emergency cut-off function.
Solve the means of problem
In order to reach such object, positioning work piece of the present invention, it has: control device, it feeds back next valve opening signal as input using the control signal transported from epigyny device with by modulating valve, obtain the deviation of control signal indicating value and valve opening signal indicating value, export according to this deviation and make the adjusted current signal of its value generation continually varying, changeover part empty with electricity, current signal from control device is converted to air pressure signal by it, positioning work piece is based on the air pressure signal from the empty changeover part of electricity, to the operator supply output pressure of modulating valve, it is characterized in that, have, comparison circuit, the control signal of described control device of giving from epigyny device inputs as branch by it, relatively this is branched the value of the control signal of input and the normal range (NR) to this control signal defined, and export this comparative result to control device, control device receive comparative result that comparison circuit sends be the value of control signal departed from the content of normal range (NR) time, no matter deviation, all the current signal being sent to electric empty changeover part is forced to be adjusted to zero.
According to the present invention, be input to comparison circuit by from epigyny device to the control signal branch of control device, in comparison circuit, compare the value of this control signal and the normal range (NR) to this control signal defined, its comparative result is transported to control device.The value transporting control signal by comparison circuit has departed from the words of the comparative result of the meaning of normal range (NR), no matter the deviation of control signal indicating value (setting aperture) and valve opening signal indicating value (actual aperture), control device all will forcibly be adjusted to zero to the current signal of electric empty changeover part.This current signal is adjusted to zero, it is the common function utilizing control device to have, namely utilize the deviation according to control signal indicating value (setting aperture) and valve opening signal indicating value (actual aperture), the value of this current signal is changed continuously and the function carrying out adjusting is carried out.Therefore, in the present invention, do not need electronic switch to be configured on the loop of adjustment electric current, not by the impact due to the breakage of electronic switch, it also avoid cost increase.
In the present invention, such as, when the normal range (NR) of control signal being set to 5 ~ 19mA, if the value of control signal is at below 5mA, or the value of control signal is at more than 19mA, just forcibly can be set to zero by giving the current signal of electric empty changeover part.Again, also normal range (NR) can be defined as more than 5mA, or it is such as the following that normal range (NR) is defined as 19mA.By normal range (NR) once be defined as more than 5mA, if the value of control signal is at below 5mA, just zero can be set to by the current signal of electric empty changeover part is mandatory.By normal range (NR) once be defined as below 19mA, if the value of control signal is at more than 19mA, just zero can be set to by the current signal of electric empty changeover part is mandatory.
Invention effect
According to the present invention, comparison circuit is inputed to the control signal branch of control device by from epigyny device, in comparison circuit, compare value and the normal range (NR) of this control signal, when the value of control signal has departed from normal range (NR) time, the common function utilizing control device to have, zero is adjusted to by giving the current signal of electric empty changeover part, therefore adjustment electric current loop on without the need to configuring electronic switch, not interdependent software, also can obtain emergency cut-off function.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the major component of a kind of mode of execution of the positioning work piece that the present invention relates to.
Fig. 2 is the structural representation in the control unit of this positioning work piece.
Fig. 3 is the schematic diagram be combined by other circuit structures of the circuit structure of the comparison circuit of this positioning work piece and current detection circuit, D/A converter, drive circuit etc.
Fig. 4 is the figure of the action for illustration of the circuit structure shown in Fig. 3.
Fig. 5 arranges to turn off the schematic diagram of unit as the major component of the existing positioning work piece of the circuit of emergency cut-off.
Embodiment
Below, with reference to the accompanying drawings embodiments of the present invention are described in detail.
Fig. 1 is the schematic diagram of the major component of a kind of mode of execution of the positioning work piece that the present invention relates to.In the figure, the symbol identical with Fig. 5 represents the constituting component identical or equal with the constituting component illustrated by reference Fig. 5, and it illustrates omission.
The positioning work piece 201 of present embodiment and the difference of existing positioning work piece 200 are: always to the supply passage of current signal (adjustment electric current) Io of electro-pneumatic converter 2 to get on to fall electronic switch 52 from control unit 1, comparison circuit 6 is set to replace comparison circuit 51, the comparative result in this comparison circuit 6 is delivered to control unit 1.
In this positioning work piece 201, control unit 1 feeds back next valve opening signal as input using the control signal (DC current signal) of the 4 ~ 20mA transported from epigyny device 100 with from modulating valve 300 by jaw opening sensor 4, obtain the deviation of control signal indicating value (setting aperture θ sp) and valve opening signal indicating value (actual aperture θ pv), according to this deviation, the value of current signal Io is changed continuously, and the current signal that have adjusted (adjustment electric current) Io is exported.Adjustment for the electric current in this control unit 1 adopts control transistor Q1.
Current signal (adjustment electric current) Io of this input as input, and is converted to air pressure signal Pn by current signal (adjustment electric current) Io from control unit 1 by electro-pneumatic converter 2.Air pressure signal Pn from electro-pneumatic converter 2 amplifies by control relay 3, is supplied to the operator 7 of modulating valve 300 as output pressure Pout.
Comparison circuit 6 inputs to the control signal of control unit 1 using from epigyny device 100 as branch, the value comparing the control signal of this branch input and the normal range (NR) specified this control signal, and exports its comparative result to control unit 1.
In the present embodiment, the normal range (NR) of the control signal of comparison circuit 6 is prescribed is 5 ~ 19mA.That is, to comparison circuit 6, lower threshold is set to 5mA, and upper limit threshold is set to 19mA.
The value of the control signal transported by comparison circuit 6 has departed from the words of the comparative result of the meaning of normal range (NR), no matter the deviation of control signal indicating value (setting aperture θ sp) and valve opening signal indicating value (actual aperture θ pv), control unit 1 all will forcibly be adjusted to zero to the current signal Io of electric empty changeover part 2.Thus, the output pressure Pout from positioning work piece 200 is lowered in fact close to zero, being forced property of modulating valve 300 ground full cut-off.
Current signal (adjustment electric current) Io in control unit 1 being adjusted to zero is that the common function utilizing control unit 1 to have is carried out, namely utilize the deviation according to control signal indicating value (setting aperture θ sp) and opening amount signal indicating value (actual aperture θ pv), the function that the value of current signal (adjustment electric current) Io is changed continuously is carried out.
Therefore, about the positioning work piece 201 of present embodiment, without the need to as the existing positioning work piece 200, electronic switch is being configured on the supply passage of current signal (adjustment electric current) Io of electro-pneumatic converter 2 from control unit 1, not by the impact due to the breakage of electronic switch, it also avoid cost increase.
Like this, in the positioning work piece 201 of present embodiment, without the need to configuring electronic switch on the loop of adjustment electric current, not depending on software and can obtain emergency cut-off function yet, achieve raising reliability, and cost also reducing.
Fig. 2 is the structural representation in the control unit 1 of the positioning work piece 201 shown in Fig. 1.In fig. 2, input terminal T1, T2 are inputted to the control signal (DC current signal) of 4 ~ 20mA.Zener diode ZD1 to be connected with input terminal T1, T2 by resistance RA and to generate the supply voltage V1 of the internal circuits such as CPU1-1.Electric capacity CB on the decoupling circuit crossing supply voltage V1, to prevent the movement of the energy between supply voltage V1 and ground connection GND, to return.
Current detection circuit 1-2 detects the value being input to the control signal of input terminal T1, T2, and the value of this control signal recorded is transported to A/D converter 1-3 and comparison circuit 6.The aperture that CPU1-1 carries out modulating valve 300 controls, and stores the control program of PID control etc. in storage M 1.The digital signal that the control of CPU1-1 exports is converted to analogue signal by D/A converter 1-4.
Drive circuit 1-5 has control transistor Q1, amplifies, impedance transformation to the analogue signal of carrying from D/A converter 1-4, as current signal (adjustment electric current) Io, is supplied to electro-pneumatic converter 2.Sensor interface circuitry 1-6 processes the valve opening signal from jaw opening sensor 4 and is delivered to A/D converter 1-3.A/D converter 1-3 carries out digital signalization to the value of the control signal transported from current detection circuit 1-2 and the value of valve opening signal that transports from sensor interface circuitry 1-6, and is delivered to CPU1-1.
The situation that other circuit structures of the circuit structure of comparison circuit 6 and current detection circuit 1-2, D/A converter 1-4, drive circuit 1-5 etc. are combined shown in Figure 3.D/A converter 1-4 has resistance R1 and electric capacity C1 and operational amplifier OP1, the control from CPU1-1 is exported (digital signal) and is converted to voltage signal (analogue signal) Vo.Drive circuit 1-5 has control transistor Q1 and resistance R3, according to the voltage signal Vo from D/A converter 1-4, generates current signal (adjustment electric current) Io, is supplied to the field coil CL of electro-pneumatic converter 2.
Current detection circuit 1-2 is configured to the buffer circuit be made up of operational amplifier OP2, according to the value of electric current I in flowing through resistance RA, and formation voltage Vi.Comparison circuit 6 is made up of the 1st comparator CP1, the 2nd comparator CP2, Schottky diode D1 and D2.In comparison circuit 6, to the reverse input end setting reference voltage V ref1 of comparator CP1, to the non-inverting input setting reference voltage V ref2 of comparator CP2, the voltage Vi corresponding with the value of the electric current I in that current detection circuit 1-2 detects is inputted to the non-inverting input of comparator CP1 and the reverse input end of comparator CP2.Schottky diode D1 and D2 be connected comparator CP1, CP2 output terminal and from D/A converter 1-4 between the output line of the voltage signal V o of drive circuit 1-5, its negative electrode is as comparator CP1, CP2 side.
Use Fig. 4, the action of the circuit structure shown in Fig. 3 is described.In this circuit structure, the electric current I in passed through in resistance RA represents the value of the control signal from epigyny device 100.In the present embodiment, the normal range (NR) of this control signal is set to 5 ~ 19mA, is set to 5mA by lower threshold, upper limit threshold is set to 19mA, correspondingly, the reference voltage V ref1 of comparison circuit 6 is set to Vref=1V, reference voltage V ref2 is set to Vref2=4V.
When the value of control signal is 5 ~ 19mA, the voltage Vi corresponding with the value of the electric current I in that current detection circuit 1-2 detects is changing (1V≤Vi≤4V) between 1V to 4V.At this moment, output Vcmp1, Vcmp2 of comparator CP1, CP2 become " Hi " grade simultaneously, voltage signal Vo from D/A converter 14 is imparted to drive circuit 1-5, and drive circuit 1-5 generates current signal (adjustment electric current) Io corresponding with the voltage signal Vo from D/A converter 1-4.
To this, if the value of control signal is below 5mA, the voltage Vi corresponding with the value of the electric current I in that current detection circuit 1-2 detects is just at below 1V, and the output Vcmp1 of comparator CP1 becomes " Lo " grade.Therefore, be set to zero from D/A converter 1-4 to the being forced property of voltage signal Vo of drive circuit 1-5, current signal (adjustment electric current) the Io vanishing that drive circuit 1-5 generates.
Again, if the value of control signal is below 19mA, the voltage Vi corresponding with the value of the electric current I in that current detection circuit 1-2 detects is just at more than 4V, and the output Vcmp2 of comparator CP2 becomes " Lo " grade.Therefore, be set to zero from D/A converter 1-4 to the being forced property of voltage signal Vo of drive circuit 1-5, current signal (adjustment electric current) the Io vanishing that drive circuit 1-5 generates.
Again, in the present embodiment, although the normal range (NR) of control signal is set to 5 ~ 19mA, this is an example, is not limited to 5 ~ 19mA.Such as, also normal range (NR) can be defined as more than 5mA, or it is such as the following that normal range (NR) is defined as 19mA.When normal range (NR) is set to more than 5mA, about the circuit structure of the comparison circuit 6 shown in Fig. 3, comparator CP2 and Schottky diode D2 can be omitted, when normal range (NR) is set to below 19mA, comparator CP1 and Schottky diode D1 can be omitted.
Utilizability in industry
Positioning work piece of the present invention, as the equipment of the aperture of regulating and controlling valve, may be used for the various fields such as process control.
The explanation of symbol
1 ... control unit; 2 ... electro-pneumatic converter; 3 ... control relay; 4 ... jaw opening sensor; 6 ... comparison circuit; 7 ... operator; 1-1 ... CPU; 1-2 ... current detection circuit; 1-3 ... A/D converter; 1-4 ... D/A converter; 1-5 ... drive circuit; 1-6 ... sensor interface circuitry; ZD1 ... Zener diode; RA ... resistance; CP1, CP2 ... comparator; D1, D2 ... Schottky diode; Q1 ... control transistor; 100 ... epigyny device; 201 ... positioning work piece; 300 ... modulating valve.
Claims (1)
1. a positioning work piece, it has:
Control unit, it feeds back next valve opening signal as input using the control signal transported from epigyny device with by modulating valve, obtain the deviation of described control signal indicating value and described valve opening signal indicating value, export according to this deviation and make the adjusted current signal of its value generation continually varying; With
Electro-pneumatic converter, the current signal from described control unit is converted to air pressure signal by it,
Described positioning work piece is based on the air pressure signal from described electro-pneumatic converter, and the operator to described modulating valve supplies output pressure,
It is characterized in that having,
Comparison circuit, the control signal of described control unit of giving from described epigyny device inputs as branch by it, relatively this is branched the value of the control signal of input and the normal range (NR) to this control signal defined, and exports its comparative result to described control unit
Described control unit receive comparative result that described comparison circuit sends be the value of described control signal departed from the content of normal range (NR) time, no matter described deviation, all the current signal being sent to described electro-pneumatic converter is forced to be adjusted to zero, wherein,
Described epigyny device is directly connected with described control unit, and described epigyny device is connected with described control unit via described comparison circuit simultaneously.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011226986A JP5843558B2 (en) | 2011-10-14 | 2011-10-14 | Positioner |
| JP2011-226986 | 2011-10-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103047464A CN103047464A (en) | 2013-04-17 |
| CN103047464B true CN103047464B (en) | 2015-06-24 |
Family
ID=48060222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210384598.XA Active CN103047464B (en) | 2011-10-14 | 2012-10-11 | Locator |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US9360026B2 (en) |
| JP (1) | JP5843558B2 (en) |
| CN (1) | CN103047464B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6295215B2 (en) * | 2015-02-23 | 2018-03-14 | アズビル株式会社 | Positioner |
| JP6295222B2 (en) * | 2015-03-17 | 2018-03-14 | アズビル株式会社 | Positioner |
| WO2016149584A1 (en) * | 2015-03-19 | 2016-09-22 | Fisher Controls International Llc | Pressure control for calibrating process control devices |
| US9739682B2 (en) * | 2015-05-04 | 2017-08-22 | Dresser, Inc. | Valve assembly calibration |
| JP6576841B2 (en) * | 2016-01-19 | 2019-09-18 | アズビル株式会社 | Positioner |
| JP6671202B2 (en) * | 2016-03-23 | 2020-03-25 | アズビル株式会社 | Positioner |
| JP2017194122A (en) * | 2016-04-21 | 2017-10-26 | アズビル株式会社 | Positioner and valve control system |
| JP6722500B2 (en) * | 2016-04-25 | 2020-07-15 | アズビル株式会社 | Positioner |
| US10240687B2 (en) | 2016-10-20 | 2019-03-26 | Fisher Controls International Llc | Methods and apparatus of testing a solenoid valve of an emergency valve via a positioner |
| US10234058B2 (en) * | 2016-10-20 | 2019-03-19 | Fisher Controls International Llc | Methods and apparatus of assessing a test of a solenoid valve via a positioner |
| IT201700014874A1 (en) * | 2017-02-10 | 2018-08-10 | Italpresse Ind Spa | PRESSOCOLATA MACHINE WITH VALVE DIAGNOSIS SYSTEM |
| CN107178654B (en) * | 2017-07-28 | 2019-02-19 | 安阳化学工业集团有限责任公司 | A kind of regulating valve realizes the device and method of double loop automatic switchover adjusting |
| US10724555B2 (en) * | 2017-07-28 | 2020-07-28 | Dresser, Llc | Generating two pneumatic signals to operate an actuator on a valve assembly |
| EP4083441A1 (en) * | 2021-04-30 | 2022-11-02 | ABB Schweiz AG | Positioner drive for controlling a valve positioner with pneumatic output |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2013088917A (en) | 2013-05-13 |
| CN103047464A (en) | 2013-04-17 |
| US20140102549A1 (en) | 2014-04-17 |
| JP5843558B2 (en) | 2016-01-13 |
| US9360026B2 (en) | 2016-06-07 |
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